Which statement about a system at equilibrium is true?(1) The forward reaction rate is less than the reverse reaction rate.(2) T
2 answers:
Answer: Option (3) is the correct answer.
Explanation:
A reaction in which the concentration of reactants equal to the concentration of products is known as an equilibrium reaction.
For example,
Therefore, we can also say that in an equilibrium reaction rate of forward reaction becomes equal to the backward reaction.
You might be interested in
Answer:
<u>5 moles S x (36.02 g S/mole S) = 180.1 grams of S</u>
Explanation:
The periodic table has mass units for every element that can be correlated with the number of atoms of that element. The relationship is known as Avogadro's Number. This number, 6.02x , is nicknamed the mole, which scientists found to be a lot more catchy, and easier to write than 6.02x
. <u>The mole is correlated to the atomic mass of that element.</u> The atomic mass of sulfur, S, is 36.02 AMU, atomic mass units. <u>But it can also be read as 36.02 grams/mole.</u>
<u></u>
<u>This means that 36.02 grams of S contains 1 mole (6.02x</u><u>) of S atoms</u>.
<u></u>
This relationship holds for all the elements. Zinc, Zn, has an atomic mass of 65.38 AMU, so it has a "molar mass" of 65.38 grams/mole. ^5.38 grams of Zn contains 1 mole of Zn atoms.
And so on.
5.0 moles of Sulfur would therefore contain:
(5.0 moles S)*(36.02 grams/mole S) = <u>180.1 grams of S</u>
Note how the units cancel to leaves just grams. The units are extremely helpful in mole calculations to insure the correct mathematical operation is done. To find the number of moles in 70 g of S, for example, we would write:
(70g S)/(36.02 grams S/mole S) = 1.94 moles of S. [<u>Note how the units cancel to leave just moles</u>]
Answer :
(1) The frequency of photon is,
(2) The energy of a single photon of this radiation is
(3) The energy of an Avogadro's number of photons of this radiation is, 11.97 J/mol
Explanation : Given,
Wavelength of photon = (1 m = 100 cm)
(1) Now we have to calculate the frequency of photon.
Formula used :
where,
= frequency of photon
= wavelength of photon
c = speed of light =
Now put all the given values in the above formula, we get:
The frequency of photon is,
(2) Now we have to calculate the energy of photon.
Formula used :
where,
= frequency of photon
h = Planck's constant =
Now put all the given values in the above formula, we get:
The energy of a single photon of this radiation is
(3) Now we have to calculate the energy in J/mol.
The energy of an Avogadro's number of photons of this radiation is, 11.97 J/mol